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AdV-SVS (Pre-commissioning)
sorrentino - 11:28 Tuesday 30 April 2024 (64137) Print this report
Improving MZI and OPA alignment in SQZ board

This morning I slightly tweaked the alignment of the optics showed in entry 56246 inside the AEI sqzueezer board, in order to improve the MZI contrast and the pump beam alignment on the OPA. 

I worked on MZI between 7:43 and 7:47 UTC, and on OPA between 7:52 and 8:19 UTC.

The MZI at the beginning was already quite high, and I could only improve it marginally  - from 68% to 73%, see first attached plot.

After tweaking the pump beam alignment, the OPA peak trasmission improved by about 5% (see second attached plot) and the main HOM in OPA scan was reduced by a comparable amount (see third attached plot).

 

 

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